Hammond 1550Z Watertight IP66 Diecast Enclosures - Hammond 1550Z108, The Hammond Diecast Enclosure (Thick Wall, 125 x 80 x 59mm) Natural 1550Z108 is a thick walled diecast aluminium watertight enclosure with natural or black finish. O ring sealed, tongue and groove construction prevents ingress of dust and water into the enclosure and fixing screws outside the gasket area avoids the need for O rings on the screws. Hammond Diecast Enclosure (Thick Wall, 125 x 80 x 59mm) Natural 1550Z108